Dabeigou Formation

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title: "Dabeigou Formation" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["geologic-formations-of-china", "lower-cretaceous-series-of-asia", "hauterivian-stage", "valanginian-stage", "cretaceous-china", "sandstone-formations", "mudstone-formations-of-china", "tuff-formations-of-china", "conglomerate-formations-of-china", "siltstone-formations", "paleontology-in-hebei"] description: "Geologic formation in Hebei, China" topic_path: "philosophy" source: "https://en.wikipedia.org/wiki/Dabeigou_Formation" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Geologic formation in Hebei, China ::

::data[format=table title="Infobox rockunit"]

Field	Value
name	Dabeigou Formation
period	Hauterivian
age	mid Valanginian-mid Hauterivian
~
type	Geological formation
prilithology	Sandstone, mudstone
otherlithology	Tuffite, conglomerate, siltstone
unitof	Jehol Biota
subunits	Numbered Members
underlies	Dadianzi & Yixian Formations
overlies	Zhangjiakou Formation
thickness	Varies, in Yushuxia section 220 m
map	{{Location map+
relief	1
width	250
float	center
lat_deg	41.7
lon_deg	116.4
mark	Green pog.svg
marksize	10
lat_deg	40.8
lon_deg	117.3
mark	Green pog.svg
marksize	10
lat_deg	42.0
lon_deg	117.7
mark	Green pog.svg
marksize	10
lat_deg	41.2
lon_deg	116.7
mark	Green pog.svg
marksize	10
coordinates
paleocoordinates
region	Hebei
country	China
namedfor
namedby
year_ts
location_ts
region_ts
country_ts
thickness_ts
::

| name = Dabeigou Formation | period = Hauterivian | age = mid Valanginian-mid Hauterivian ~ | image = | imagesize = | caption = | type = Geological formation | prilithology = Sandstone, mudstone | otherlithology = Tuffite, conglomerate, siltstone | unitof = Jehol Biota | subunits = Numbered Members | underlies = Dadianzi & Yixian Formations | overlies = Zhangjiakou Formation | thickness = Varies, in Yushuxia section 220 m | area = | map = {{Location map+ | China#China Hebei | relief = 1 | width = 250 | float = center | places = | lat_deg = 41.7 | lon_deg = 116.4 | mark = Green pog.svg | marksize = 10 | lat_deg = 40.8 | lon_deg = 117.3 | mark = Green pog.svg | marksize = 10 | lat_deg = 42.0 | lon_deg = 117.7 | mark = Green pog.svg | marksize = 10 | lat_deg = 41.2 | lon_deg = 116.7 | mark = Green pog.svg | marksize = 10 | map_caption = | location = | coordinates = | paleocoordinates = | region = Hebei | country = China | extent = | namedfor = | namedby = | year_ts = | location_ts = | coordinates_ts = | paleocoordinates_ts = | region_ts = | country_ts = | thickness_ts = The Dabeigou Formation () is a palaeontological formation located in Hebei, China. It dates from the mid Valanginian to Hauterivian age of the Cretaceous period, approximately 135 to 130 Ma.

Fossil content

Fossils include the confuciusornithiform bird Eoconfuciusornis. As of 2016 this is the oldest bird with a toothless beak known, but it belongs to a very ancestral avian lineage not closely related to living birds. ;Birds

• Jinguofortis perplexus ;Amphibians
• Regalerpeton weichangensis ;Insects
• Amplicella beipiaoensis
• A. exquisita
• A. shcherbakovi
• Brachyopteryx weichangensis
• Chresmoda multinervis
• C. shihi
• Coptoclava longipoda
• Glypta qingshilaensis
• Hebeicoris xinboensis
• Jibeigomphus xinboensis
• Manlayamyia dabeigouensis
• Mesasimulium laihaigouense
• M. laiyangensis
• Mesolygaeus hebeiensis
• Mesoplecia xinboensis
• Pleciofungivora yangtianense
• Priscotendipes mirus
• Vitimoilus ovatus
• Notocupes lentus
• Amplicella sp.
• Ichneumonidae indet.
• Tanychorinae indet.

References

Bibliography

References

1. [https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Dabeigou&group_formation_member=Dabeigou Dabeigou Formation] at [[Fossilworks]].org
2. Qin et al., 2018
3. Zhang et al., 2008
4. Wang & Stidham, 2018
5. Rong, 2018
6. Kopylov & Zhang, 2015
7. Hong, 1984
8. Zhang et al., 2009
9. Ren, 1995
10. Zhang, 1986

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